Hello
Since these symptoms are from last 2 weeks .
The main reason of these symptoms may be hyper acidity or
gastritis or
indigestion ( popularly known as). Do as and change dietary habit , you will get relief.
Try raising the head of your bed about 4 inches with blocks. It might also help to avoid EATING or DRINKING for 2 hours before you lie down. To help control stomach acid one should not drink alcohol or drinks with caffeine in them or eat chocolates or spicy or greasy foods . Also take some
antacid ( if it contains oxetacine better) just after your dinner or lunch .
In your case symptoms are sever so you may need drugs like "
rebamipide 100 mg twice in a day for at least 3 - 6 months" .
As you mentioned that you are not taking spicy or greasy foods but I have noted that patient overeat and this is main cause of indigestion so eat less and less and you will feel better.
When such patient visit in my clinic with these symptoms ( very common complaint of patients , I advise them don't take dinner for few day ( if can't remain without food eat less and less).
Hope this information will help you.